Bit socket



Aug. 6, 1929. s. R. AuDlBx-:RT

BIT SOCKET Filed nec. 19, 1927 fill Patented ug. 6, 1929.

UNITED STATES 1,723,717 PATENT OFFICE.

STEPHEN JELCHARD AUDIBERT, OF FORT KENT, MAINE, ASSIGNOR OF ONE-HALF TO l DA'VID`A. COURY, OF FORT KENT, MAINE.

BIT SOCKET.

Application filed December 19, 1927.

lily invention relates to bit sockets, that is, to sockets 'tor .inti-u'changeably holding borinir or drilling hits.

lfhe object oit nly invention is to provide an improved bit socket adapted to receive and securely hold bits ot all sizes within the capacity ot the socket. ik Afurther object of niy invention is to provide an. improved bit socket in which the looking;` or releasing ot the bit is ijuiiizkly accoinplisl'ied by a single,

substantially iiistantancous operation. A 'further object ot iny invcntiini is to provide a bit socket in which the bit holdingi ine-ans is locked so as to j irevent accidental releasing` or looseninp; ot the bit. Other objects will appear hereiinifter.

lli'ith these objects in view my ii'ivention minsists `enerally in a tool shank, a pair ot rocker a ws on the shank adapted to Ae'jrip the bit. a sleeve slidably mounted on 'the shank to open and close said jaws and a lever or actual' r said sleeve. My invention Aturtlnr consists in a device as mentioned further clniracterized by a, second sleeve on the shank and a link connecting the last mentioned sleeve and said lever7 whereby swinging' ot the lever will nieve the 'Iii-st mentioned sleeve te open or close the jaws. lily invention fue ther consists in a bit socket as mentioned .in which the secolld mentioned sleeve provided with a spring` adapted to exert yielding tension on the link and lever when in jaw closing,- jjiosition, and in which the connection between the link :nd the lever is adapted to pass the line o'tf centers ot the lever tulcruni and the point ol? connection between the link and the second mentioinal sleeve, whereby the device is locked .in bit securing); position. lll y invention further consists in various details et instruction and arrangements ot parts, all as will be 'lully described hereinaiter and partieularly jjiointed out in the elainis.

lily invention will be more readily understood hy reference to the aceonipanying drawings terminel a part oit this` specification and Vin whichliigr. l an elevation of a. bit socket e1nbodyingi` iny invention7 Fie". 2 is a bottom plan view thereof,

Fie'. 3 is a section on the line 3-3 ot Figi. illustratin the aws in open position, and

j Fig'. 4l; is a similar view illustratin the jaws in closed position.

Serial No. 241,095.

:Referring now to the drawings l indicates a tool shank, which may be either the shank ol an auger brace or the shank ot a, drill press. '.lhe upper portion ot the shank preterably cyliinlrical, as indicated, but the lower portion is squared as .iinlicated at 2. The niajor part olf the squared portion 9. is bifurcated tornlillgr recesses 'l-i :tor a pair ot oppositely disposed jaws` el A web 5 extends downwardly a short distance to sup-- port a transversely retaining pin (i upon which the aws l are pivotally mounted, The inner faces ol the bililrcateifl portion are rectid as at 7 to receive the squared head ot a bit. j

Slidably .mounted on the bilurcated end ot the shank and enclosingr the jaws l: is a jaw actuating' sleeve 8. This has a, square bore i) to tit the bi'turcated end oit the shank, and the outer itaees ot the jaws are transversely squared as at llt) to lit in diagonally opposite corners of the bore, as clearly :indicated in Fig'. 2. 'lhese outer ilaces ot the jaws are also concavely curved longitudinally7 'torin- .ing cani edges ll to be contacted and operated by the upper and lower edges ot the sleeve S. See Figs. S3 and el. By moving the sleeve upwardly, the lower or bit receivinglr portion ot the jaws are openedj whereas by movingthe sleeve downwardly said jaws are closed upon the end or head ot the bit. '.l he

inner laces ot the jaws are prelerably torlned with squared recesses l2 to receive a squared bit heai'l. The inner itaees et the jaws. at their upper endsj are formed with rocker taees l-i. whereby the jaws may rock on the lateral faces of the web.

Mounted upon the shank l, above the sleeve 8, is a sccoinl sleeve '14, which is preferably formed with a cyliinlrical bore l5 terminatingr is a eapiare bore i6, at its lower end torining1 shoulders 17. 18 indicates a, pin cxtending transversely through the shank l, and arranged within the bore l5. Inter-posed between the pin 1S and the shoulders 1.7 is a coiled spring 19, which norn'ially tends to force the sleeve, ll downwarly. 20 indicates a stop for liniiting the downward movenient of the sleeve 14.

Pivotally connected as at Q1. to the sleeve 8 is a pair ot levers 22 connected at their upper ends by a yoke 2&3. which, when the lever is in j aw locking' position.` rests within a recess Qt formed in the tace ot" the sleeve ll. li vot-ally connected to the sleeve 14; as at 25 are links 2G,

ltltl llt) lll

the lower ends of which are pivotally connected as at 27 to the levers 22, preterably adjacent the pivot 2l. The arrangement is such that when the levers are thrown into the position shown in full lines in Fig. l, the pivot 27 will pass beyond the line of centers between the pivots 2l and 25, thereby lockingl the device against accident-al displacement of the lever and loosening of the jaws.

It is obvious that with a device ot this construction bits olf various sizes may be inserted and securely held within the jaws` rl`o open the jaws for the insertion or removal of a lit, the lever is sw un g downwardly as indicated in dotted lines in Fig. l. The sleeve llt will then be in engagement with the stop 2t) and through the medium of the links 2G the sleeve S will be raised into the position shown in dotted lines in Fig. l, and in lull lines in Fig. This forces open the lower ends of the jaws l. lVhen the bit is inserted the lever is swung' upwardly int-o the position shown in full lines in Fig. l. This forces the sleeve S downwardly until the jaws ti glitly grasp the bit head or shank. Further movement of the lever will then force the sleeve 14 upwardly Itis obvious that bits of any size may be held, the only difference bennal that the larger the bit the less movement is required to close the jaws upon the same and greater movement ot the sleeve ll will be required to compensate for the lesser movement ot the sleeve S.

I claim:

l. lin a device oit the class described a shank, a pair o't jaws on the shank, a sleeve slidahle on the shank and adapted to open and close said jaws, a. second sleeve mounted on said shank, a lever pivotally connected to the lirst mentioned sleeve, a link pivotallv conneeted at one end to said second mentioned sleeve, the opposite end ol' said iin; henna' pivotally connected to said lever, and a sprin associated with the second mentioned sleeve adapted to exert tension on said link when the device is in jaw closing position, substantially as described.

2. A device as set forth in claim l, in which the pivotal connection between the link and the lever is eccentric to the pivot ol' the lever. whereby said connection will pass hel ween the line oi centers olf the connections between the link and he lever and their respective sleeves, when the lever is moved into jaw closingt positiven, substantially as described.

ln testimony wherco'lf l have signed in v name to this specification.

STEPHEN ll. Al'lll lllfll't'l.

Attl

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